What are the best roof vents for metal roofs?
Short answer. For most metal roofs, the best exhaust is a continuous vented ridge: the deck is slotted and the metal ridge cap sits over a profile matched vented closure or ridge vent material that blocks rain and insects. Pair it with soffit intake or vented eave closures, and use metal specific flashings for any separate vents.
Exhaust options, best to least preferred
- Vented ridge with profile closures. Closures shaped to the panel ribs, with a breathable mesh or vented foam, fill the gaps under the ridge cap. They keep rain and insects out while allowing airflow, which gives continuous, low profile exhaust.
- Universal vented ridge material. Rolled or rigid vent material that conforms to different panel profiles under the cap. It is fast to install, but it must be compressed correctly against the ribs to seal.
- Low profile box vents with metal bases. Useful on hip roofs with short ridges. They need curb style or flexible flashing made for metal panels; standard shingle vents are not designed to seal over ribs.
- Turbines and power fans. They work, but they add moving parts and large penetrations to a roof that otherwise has very few.
Intake options
Standard soffit vents work under metal just as they do under shingles. On homes without overhangs, vented eave closures at the bottom of the panels or edge intake products can supply intake air.
What to avoid
- Solid foam closures at the ridge on a roof that is meant to be vented. They look tidy but block airflow.
- Sealant as the primary waterproofing around a vent base. Sealant is a backup, not the flashing.
- Mixing exhaust types on the same attic, which short circuits airflow just as it does under shingles.
Use the panel manufacturer's own trim and closures where available, since their warranties are often tied to approved details. Learn more in metal roofing in Georgia and roof flashing explained.